The two hedge fund managers got in a knock-down drag-out war of words on CNBC's Fast Money after Ackman called the nutrient supplement company Herbalife a "pyramid scheme," according to CNBC. Icahn called into the studio after the commercial break ready for a donnybrook over Ackman's recent short sell of the company's stock.
At one point, Icahn exclaimed, "that's complete bullshit!" in reference to Ackman's remarks.
Ackman defended his position, saying the problem with Icahn is that "he's not used to someone stepping up to him." The two men have a history of fighting with each other that dates back to 2003 when a deal over a real estate company soured, Business Insider reports.
Not surprisingly, the Twitter reaction to the spat has been nearly as colorful as the fight itself:
What I'm learning from this Icahn-Ackman spat: Neither guy is all that busy and just talk on TV for as long as they like.
— Jay Yarow (@jyarow) January 25, 2013
Two billionaires are evidently on CNBC cursing at each other. #RiseAbove
— Pat Garofalo (@Pat_Garofalo) January 25, 2013
Icahn is a bit like Foreman in the Rumble In The Jungle. Might lose by out punching.
— Joseph Weisenthal (@TheStalwart) January 25, 2013